/* Legacy lesson components. Tokens come from labs.css. */
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  padding: 36px 20px 72px;
}
.wrap {
  max-width: 1100px;
  margin: 0 auto;
}
h1 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: clamp(34px, 4.2vw, 44px);
  line-height: 1.06;
  margin: 0 0 10px;
  text-wrap: balance;
  letter-spacing: -0.012em;
}
.lede {
  color: var(--muted);
  max-width: 64ch;
  margin: 0 0 36px;
  font-size: 17px;
}
h2 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: 25px;
  margin: 56px 0 6px;
  text-wrap: balance;
}
.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
p {
  max-width: 68ch;
  margin: 0 0 12px;
}
.m {
  font-family: "Fraunces", Georgia, serif;
  font-style: italic;
}
.eq {
  font-family: "IBM Plex Mono", monospace;
  font-size: 14px;
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 12px 14px;
  border-radius: 6px;
  margin: 10px 0 14px;
  overflow-x: auto;
  white-space: nowrap;
  max-width: 68ch;
  line-height: 1.7;
}
.eq .hl {
  background: rgba(224, 128, 26, 0.18);
  padding: 1px 4px;
  border-radius: 3px;
}
.eq .hp {
  background: rgba(106, 63, 181, 0.16);
  padding: 1px 4px;
  border-radius: 3px;
}
.scene {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 296px;
  gap: 20px;
  align-items: start;
  margin-top: 14px;
}
@media (max-width: 980px) {
  .scene {
    grid-template-columns: 1fr;
  }
}
.paper {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 10px;
  overflow: hidden;
}
canvas {
  width: 100%;
  height: auto;
  display: block;
  max-width: 100%;
}
.ctl {
  display: flex;
  flex-direction: column;
  gap: 13px;
}
.ctl label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--muted);
}
.ctl label span.v {
  font-family: "IBM Plex Mono", monospace;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
input[type="range"] {
  width: 100%;
  accent-color: var(--purple);
}
select {
  font: inherit;
  font-size: 13px;
  padding: 4px 6px;
  border-radius: 5px;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
}
.btns {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
button {
  font: inherit;
  font-size: 13.5px;
  font-weight: 500;
  padding: 7px 12px;
  border-radius: 6px;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
}
button.primary {
  background: var(--purple);
  border-color: var(--purple);
  color: #fff;
}
button:focus-visible {
  outline: 2px solid var(--purple);
  outline-offset: 2px;
}
.readout {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 12px;
  font-variant-numeric: tabular-nums;
  border-top: 1px solid var(--rule);
  padding-top: 10px;
}
.readout .k {
  color: var(--muted);
}
.cap {
  font-size: 14px;
  color: var(--muted);
  margin-top: 8px;
  min-height: 2.6em;
}
.note {
  font-size: 13.5px;
  color: var(--muted);
  border-left: 2px solid var(--rule);
  padding-left: 12px;
  margin: 6px 0;
}
.say {
  border-left: 3px solid var(--or);
  background: var(--soft);
  padding: 8px 12px;
  margin: 14px 0 0;
  max-width: 68ch;
  font-size: 14.5px;
}
.say b {
  font-family: "IBM Plex Mono", monospace;
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--or);
  display: block;
  margin-bottom: 2px;
}